[Evaluation of the efficacy and safety of intravenous infusion of ferric derisomaltose in the treatment of iron deficiency anemia: a single-center retrospective analysis]

Objective: To investigate the clinical efficacy and safety of ferric derisomaltose injection versus iron sucrose injection in the treatment of iron deficiency anemia (IDA) . Methods: A total of 120 patients with iron deficiency anemia admitted from June 2021 to March 2023 were given intravenous iron supplementation with ferric derisomaltose to assess the efficacy and safety of hemoglobin (HGB) elevation before and after treatment. Simultaneously, the clinical effects of iron supplementation with iron sucrose were compared to those of inpatient patients during the same period. Results: Baseline values were comparable in both groups. Within 12 weeks of treatment, the elevated HGB level in the ferric derisomaltose group was higher than that of the iron sucrose group, with a statistical difference at all time points, and the proportion of HGB increased over 20 g/L in the patients treated for 4 weeks was higher (98.7%, 75.9% ). During the treatment with ferric derisomaltose and iron sucrose, the proportion of mild adverse reactions in the ferric derisomaltose group was slightly lower than that of the iron sucrose group, and neither group experienced any serious adverse reactions. The patients responded well to the infusion treatment, with no reports of pain or pigmentation at the injection site. Conclusion: The treatment of IDA patients with ferric derisomaltose has a satisfactory curative effect, with the advantages of rapidity, accuracy, and safety. Therefore, it is worthy of widespread clinical use.

[Hyperglycemia caused by mutation of GCK gene in 10 patients analysis of clinical and mutation characteristics]

Objective: To explore the gene mutation characteristics and detailed clinical presentations of hyperglycemia caused by GCK mutations in 10 patients. Methods: The clinical and follow-up data of 10 patients with hyperglycemia caused by mutation of GCK gene were reviewed. The patients were ascertained between January 1, 2014 and August 31, 2018 at the Department of Pediatrics, the First Affiliated Hospital of Zhejiang University and Ningbo Women & Children's Hospital. Clinical data were collected, including age, gender, main complaint, family history, fasting blood glucose, fasting blood insulin, 2-hour blood glucose, 2-hour blood insulin after oral glucose tolerance test, glycosylated hemoglobin, anti-glutamic acid decarboxylase antibody and body mass index. Mutations of GCK gene were detected by Sanger sequencing or high-throughput sequencing of diabetes-related genes in the patients and their family members. Results: There were ten patients, 8 of them were male, 2 were female.The ages at diagnosis varied between 4.7 to 12.3 years. The patients usually did not have obvious clinical symptoms of diabetes mellitus. Most of them were unexpectedly found to have hyperglycemia and with impaired glucose metabolism in three consecutive generations. The fasting blood glucose of patients was 6.8-7.7 mmol/L, 2-hour postprandial blood glucose was 7.8-11.6 mmol/L. Fasting blood insulin was 0.5-8.5 mU/L, glucose tolerance test results showed that 2 h postprondial blood insulin was 1.3-55.4 mU/L. The level of glycosylated hemoglobin was 6.1%-6.8%. Anti-glutamic acid decarboxylase antibody was negative in all patients. The GCK mutations identified in patients and one of their parents were located at exon5 (4 cases), exon9 (2 cases), exon2 (1 case), exon4 (1 case), exon6 (1 case) and exon7 (1 case). Conclusions: Most of the hyperglycemia patients caused by GCK mutations did not have typical clinical symptoms of diabetes. The fasting blood glucose was slightly elevated. Abnormal glucose tolerance test results were found in all 10 patients. Three consecutive generations of family had impaired glucose metabolism. GCK mutations located at exon 5 were common in 10 cases. There was no correlation between type of mutations and plasma glucose levels in domestic and international researches. When fasting glucose was found abnormal in clinic, a complete family history should be taken and the GCK gene should be sequenced to confirm the diagnosis in time.

[A preliminary study on SLAMF6 expression in patients with severe aplastic anemia]

目的

探讨SLAMF6在重型再生障碍性贫血（SAA）CD8⁺ T细胞中的表达情况及其与疾病免疫状态的相关性。

方法

选取2017年2月至2018年4月天津医科大学总医院血液科收治的初治SAA患者21例，以15例健康人外周血标本作为正常对照，应用流式细胞术（FCM）检测外周血CD8⁺ T细胞SLAMF6表达量，并与患者HGB、PLT、中性粒细胞绝对值、网织红细胞绝对值、骨髓造血功能（粒系百分比、红系百分比、淋系百分比、巨核细胞数）等临床指标及CD8⁺ T细胞功能分子穿孔素、颗粒酶B、IFN-γ表达量进行相关性分析。进一步采用anti-SLAMF6 Ab阻断其功能，FCM检测CD8⁺ T细胞穿孔素、颗粒酶B、IFN-γ分泌量。

结果

初治SAA患者CD8⁺ T细胞SLAMF6表达量明显低于正常对照，差异有统计学意义[（56.29±12.97）%对（80.96±7.36）%，t=−7.672，P<0.001]；初治SAA患者CD8⁺ T细胞SLAMF6表达量与HGB、PLT、中性粒细胞绝对值、网织红细胞绝对值、骨髓粒系百分比、骨髓红系百分比均呈正相关（P<0.05），与CD8⁺ T细胞穿孔素、颗粒酶B、IFN-γ表达量均呈负相关（P<0.05）；anti-SLAMF6 Ab阻断该信号分子后，初治SAA患者CD8⁺ T细胞anti-SLAMF6 Ab处理组穿孔素、颗粒酶B、IFN-γ表达量较未处理组明显增多，差异有统计学意义（P值均<0.05）。

结论

SLAMF6在SAA患者CD8⁺ T细胞中明显低表达，其可能作为负性免疫调节分子通过影响CD8⁺ T细胞功能分子的分泌参与SAA的发生机制。

Polymorphic microsatellite markers in the false kelpfish Sebastiscus marmoratus: isolation, characterization, and cross-species amplification

A (GT/CA)13-microsatellite-enriched genomic library of the false kelpfish Sebastiscus marmoratus was constructed, and 20 polymorphic microsatellite loci were isolated and characterized. The polymorphisms were investigated in 48 wild individuals from a single population collected from the northern Yellow Sea. The numbers of alleles per locus varied from 4-22 with an average of 9. The observed and expected heterozygosities of each locus ranged from 0.196-0.958 and from 0.487-0.942, with an average of 0.693 and 0.765, respectively. One locus significantly deviated from Hardy-Weinberg equilibrium, and one pair of loci was in linkage disequilibrium determined by Bonferroni's correction. Cross-species amplification was also conducted in the related species Inimicus japonicus, collected from East China Sea. The result showed that six loci could be amplified from I. japonicus DNAs. These polymorphic markers would be useful for assessment of genetic variation and population structure of scorpionfish.

Novel tetranucleotide microsatellite markers for Chinese beard eel (Cirrhimuraena chinensis Kaup)

In this study, we characterized 12 novel polymorphic microsatellite loci for Chinese beard eel (Cirrhimuraena chinensis Kaup) from a tetranucleotide microsatellite-enriched library. Loci screened on a sample of 37 individuals from Xiamen wild stocks revealed 8 to 24 alleles per locus, with a mean of 13.83 over all loci. Observed and expected heterozygosities ranged from 0.270 to 0.944 and 0.439 to 0.942, respectively. These efficient genetic markers thus provide useful tools in the study of the population genetics and phylogeography of Chinese beard eel.